Method for producing a superconducting magnet coil

• US 5,538,942 A
• Filed: 01/20/1995
• Issued: 07/23/1996
• Est. Priority Date: 11/30/1990
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Honjo, Koo, Numata, Seiji, Suzuki, Masao, Koyama, Toru, Takahashi, Akio, Fukushi, Keiji, Mukoh, Akio
• Primary Examiner(s): King, Roy V.
• Application Number:
  US08/375,660
• Time in Patent Office: 550 Days
• Field of Search: 427/62, 427/116, 427/177, 427/386, 505/430, 505/887, 505/884, 505/705, 505/813, 428/457, 428/473.5, 428/474.4, 428/458, 428/930, 335/216, 174/125.1
• US Class Current: 505/430
• CPC Class Codes: H01F 6/06 Coils, e.g. winding, insulating, terminating or casing arrangements therefor
• CPC Class Codes: Y10S 428/93 Electric superconducting
• CPC Class Codes: Y10S 505/705 Magnetic coil
• CPC Class Codes: Y10S 505/813 Wire, tape, or film
• CPC Class Codes: Y10S 505/884 Conductor
• CPC Class Codes: Y10S 505/887 Conductor structure
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31721 Of polyimide
• CPC Class Codes: Y10T 428/31725 Of polyamide

Abstract

A superconducting magnet coil is produced by winding a superconducting wire to form a coil; impregnating the coil with a curable resin composition of low viscosity which contains for example at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F and diglycidyl ether of bisphenol AF, all having a number-average molecular weight of 350-1,000, a flexibilizer and a curing catalyst, to obtain a curable-resin composition-impregnated coil; and heating the curable-resin-composition-impregnated coil to cure the composition.

Claims

1. A process for producing a superconducting magnet coil which comprises the steps of:

(a) winding a composite superconductor comprising a plurality of thin superconducting wires and a stabilizer selected from the group consisting of copper and aluminum which stabilizer is thermally or electrically contacted with the wires to form a coil,

(b) filling the gap between coils of the composite superconductor with a curable resin composition having a viscosity of 0.01-10 poises at the time of filling and comprising (i) at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F and diglycidyl ether of bisphenol AF, all having a number-average molecular weight of 350-1,000, (ii) a flexibilizer, and (iii) a curing catalyst, to obtain a curable-resin-composition-impregnated coil, and

(c) heating the curable-resin-composition-impregnated coil to cure the composition,

the step (a) including subjecting the composite superconductor to surface treatment with a coupling agent before winding the composite superconductor.